<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb>
            <el-breadcrumb-item :to="{path:'/home'}">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>权限列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="dialogVisible=true">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表区域 -->
            <el-table :data="rolesList" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom', i1===0?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id"  >
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                            <!-- 通过for循环渲染二级权限 -->
                               <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id" >
                                   <el-col :span="6">
                                       <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                       <i class="el-icon-caret-right"></i>
                                   </el-col>
                                   <el-col :span="18">
                                        <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>

                                   </el-col>
                               </el-row>
                            </el-col>
                        </el-row>
                        <!-- <pre>
                            {{scope.row}}
                        </pre> -->
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index"></el-table-column>
                <el-table-column prop="roleName" label="角色名称"></el-table-column>
                <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
                <el-table-column  label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
                        <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
                        <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)" >分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 添加角色的对话框 -->
        <el-dialog
            title="添加角色"
            :visible.sync="dialogVisible"
            width="50%" @closed="addFormClosed">
            <!-- 内容主体区域 -->
            <el-form :model=" addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" >
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="dialogVisible = false">取 消</el-button>
                <el-button type="primary"  @click="addRole">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改角色对话框 -->
        <el-dialog
            title="修改角色"
            :visible.sync="editDialogVisible"
            width="50%" @closed="editDialogClosed">
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px" >
                 <el-form-item label="角色名称" >
                    <el-input v-model="editForm.roleName" disabled></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRoles">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 分配权限的对话框 -->
        <el-dialog
            title="分配权限"
            :visible.sync="setRightdialogVisible"
            width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightdialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>

    </div>

</template>

<script>
export default {
  data () {
    return {
      // 角色列表数据
      rolesList: [],
      dialogVisible: false,
      // 添加角色的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加表单的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 1, max: 15, message: '长度在 1 到 15 个字符', trigger: 'blur' }
        ]
      },
      // 控制修改角色对话框的显示与隐藏
      editDialogVisible: false,
      // 查询到的角色信息对象
      editForm: {},
      // 修改表单数据的验证规则
      editFormRules: {
        roleDesc: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ]
      },
      setRightdialogVisible: false,
      // 所有权限数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数组
      defKeys: [],
      roleId: ''
    }
  },
  created () {
    // 获取所有角色列表
    this.getRolesList()
  },
  methods: {
    // 获取角色列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$http.error('获取角色列表失败!')
      }

      this.rolesList = res.data
    //   console.log(this.rolesList)
    },
    // 监听添加角色对话框的关闭事件
    addFormClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击确定 添加角色事件
    addRole () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加角色的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          return this.$message.error('角色添加失败!')
        }
        this.$message.success('角色添加成功')
        // 隐藏添加角色对话框
        this.dialogVisible = false
        // 刷新角色列表数据
        this.getRolesList()
        // console.log(res.data)
      })
    },
    // 展示修改角色的对话框
    async showEditDialog (id) {
      console.log(id)
      // 根据id查询对应的角色信息
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    //   console.log(res.data)
    },
    // 监听修改角色对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 修改角色信息并提交
    editRoles () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 正式发起提交修改角色信息的请求
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc })
        if (res.meta.status !== 200) {
          return this.$message.error('角色信息修改失败')
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 更新数据列表
        this.getRolesList()
        // 提示修改成功
        this.$message.success('角色信息修改成功')
      })
    },
    // 根据对应的id删除角色
    async removeRoleById (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消了删除')
      }
      // 如果用户取消了删除 ，则返回字符串cancel
      // 如果用户确认了删除， 则返回字符串confirm
      //   console.log(confirmResult)
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败')
      }
      this.$message.success('删除角色成功')
      this.getRolesList()
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      //   console.log(confirmResult)
      // -----如果用户点击了取消，则返回字符串cancel
      // ------如果用户点击了确定，则返回字符串confirm
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除!')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      this.$message.success('删除权限成功')
      role.children = res.data
    },

    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      // 获取所有的权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('权限数据获取失败')
      }
      // 把获取到的权限数据保存到data中
      this.rightsList = res.data
      console.log(this.rightsList)

      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightdialogVisible = true // 在展示分配全选对话框之前 先要获取所有权限的数据
      this.roleId = role.id
    },

    // 通过递归的形式，获取角色下所有三级权限的Id,并保存到defKeys数组中
    getLeafKeys (node, arr) {
      // 如果当前node节点不包含children属性,则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')

      this.getRolesList()
      this.setRightdialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag{
    margin:7px
}
.bdtop{
    border-top: 1px solid #eee
}
.bdbottom{
    border-bottom: 1px solid #eee
}
.vcenter{
    display: flex;
    align-items: center
}
</style>
